Q15 of 32 Page 100

AB is a current carrying conductor in the plane of the paper as shown in Figure 13.7. What are the directions of magnetic fields produced by it at points P and Q? Given r1 > r2, where will the strength of the magnetic field be larger?

At point P: By applying Fleming’s right hand rule, magnetic field will be in anticlockwise direction around the current direction. The magnetic field will be to point P and towards the plane of paper.


At point Q: At this point, the direction of the current is away from the conductor and away from the plane of paper.


Magnetic field will be stronger at point Q than at point P because the strength of magnetic field is stronger when it is near to the conductor and weak when away from the conductor.


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